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Absent flow void in the right intracavernous ICA with cuff of intramural high signal on T1 (methaemoglobin) in the distal right ICA at the skull base consistent with dissection. Note how the right ICA diameter is greater than on the left due to this methaemoglobin. Absent right ICA on the TOF MRA with a methaemoglobin high signal cuff on the source image. Right ICA branches (ACA and MCA fill via the circle of Willis).